6: Week-End IT was eleven-thirty when Callaghan was shown into Gringall's room at Scotland Yard. He said: "Hallo, Gringall. It's nice seeing you again so soon." Gringall smiled. "Yes," he agreed. "You and I go for years and don't see each other, and then we meet a lot. Life's strange, isn't it?" Callaghan nodded. "It is," he said. "And all because you remembered my birthday. I hope you'll remember it next year. Did you want anything?" He put his hat on the corner of Gringall's desk, lit a cigarette. Gringall got up from his chair. He said: "That's a nice suit you're wearing— but then you always wear good clothes. And a silk shirt, too— you private detectives must make a lot of money." "That's because we're so clever," Callaghan said. "We find things out— sometimes." The Chief Det

